Samsung 20031016132210843 5 trouble 474 free download

File name 20031016132210843_5_trouble_474.pdf

5 Troubleshooting 5-1 No Power Does proper DC 14V/5V appear at No 1 Check FT101 and FT103. DC jack connected to CN120? Yes Does proper DC 5V No 4 Check IC103 and IC102. appear at Pin 2 of IC102? Yes Does proper DC 2.5V No 2 Check IC106. appear at Pin 2 of IC106? Yes Does proper DC 14V No 3 Check IC108. appear at Pin 5 of IC108? Yes Does proper DC 5V No 1 Check IC108. appear at FT107? Yes Check IC401. LW20M11C 5-1 5 Troubleshooting WAVEFORMS 1 2 3 4 5-2 LW20M11C 5 Troubleshooting 5-2 No Picture (TV, Video, S-Video, DVD) Check C452 (TV) Check C453 (Video) No 5 Check the input signal. Check C454 (S-Video) Check C456 (DVD)? Yes Check the IC401. WAVEFORMS 5 LW20M11C 5-3 5 Troubleshooting 5-3 No Sound Does the signal appear at Pin 67 (Tuner sound signal) and No (RF) Check the Pin 8 of CN701. Pin 53, 54 (Video sound) and (Video Sound) Check the CN903. Pin 56, 57 (DVD Sound) (DVD Sound) Check the CN905. of IC501 (MSP3425)? Yes Does the signal appear at Pin 27, No Check the Pin 3 of IC501 and 28 of IC501 (MSP3425)? related circuit of IC501. Yes Does the signal appear No Check the IC651 (Audio amp) at Pin16, 19, 2 and 5 of CN651? and related circuit of IC651. Yes Replace the speaker. 5-4 LW20M11C